Merge branch 'next'

# By Ruediger Meier
# Via Ruediger Meier (1) and Sebastian Freundt (1)
* next:
  tests, gdate 2039 problem is probably also a 1970 problem
  tests, ignore specific strerrors (BSD)
  tests, don't use head -n-1 (fix BSD)
  tests, remove original convt tests (inclusive test compiler)
  tests, rewrite convt tests for dt test compiler
  tests, don't use useless option --hash
  tests, add clean rule for local tempdirs
  tests, fix renamed stdin, stderr, stdout variables
  tests, fix renamed TS_EXP_EXIT_CODE variable
  test suite, copy over improved test suite from uterus
minor, backport new test suite file naming and flow policies to example generators (gentexi, genh2m)

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'test/suite' into next

* test/suite:
  minor, backport new test suite file naming and flow policies to example generators (gentexi, genh2m)